Origin of GLIRIDAE. New Latin, from Glir-, Glis, type genus + -idae. This word doesn't usually appear in our free dictionary, but the definition from our premium Unabridged Dictionary is offered here on a limited basis.Note that some information is displayed differently in the Unabridged.rigin of GLIRIDAE. New Latin, from Glir-, Glis, type genus + -idae. This word doesn't usually appear in our free dictionary, but the definition from our premium Unabridged Dictionary is offered here on a limited basis.
knockout mouse(Noun) Any of several forms of mice that have been genetically engineered by inactivating specific genes. Knockout mouse. A knockout mouse is a genetically engineered mouse in which researchers have inactivated, or knocked out, an existing gene by replacing it or disrupting it with an artificial piece of DNA.
Using knock-in genetic engineering, Jacobs et al. have effectively created a mouse with a retina like that of a New World monkey, with one very important difference: mice do not have well-developed form vision, and do not have midget cells. Mice do not already have the hardware that many assume is a critical first step to the evolution of color vision. Despite this, three of the five transgenic heterozygote female mice tested by the authors could discriminate reds from greens, showing color matches remarkably similar to humans .